Lung cancer mortality trends in Mexico, 1998-2018: the impact of the General Law on Tobacco Control.

OBJECTIVE: The aim of this study was to describe trends in lung cancer (LC) mortality and trends in tobacco use. METHODS: This is an ecological time-series study to determine mortality trends due to lung cancer resulting from tobacco consumption, based on secondary open-access sources, such as the National Surveys. Smoking prevalence, tobacco use trends, mortality rates, and percentage were determined by LC. The mortality trend from LC was calculated, and a linear regression analysis was performed to evaluate the impact of the General Law for Tobacco Control. RESULTS: The prevalence of tobacco use decreased steadily between 1988 and 2015, particularly in men. Mortality rates and percentage decreased between 1998 and 2018. During this period, the mortality rate decreased from 6.3 to 5.4 per 100,000 population (-0.032/100,000 each year, p<0.001), with a net decrease of 0.9 per 100,000. We observe increases in mortality in women in the central and southeastern regions. Of 32 states, 18 showed a tendency to loss (p<0.005). The rate of change for men was -0.24, with a total reduction of 2.17 before the introduction of the laws and -0.32 after their introduction, a total reduction of 3.24 (p<0.005). Women showed no reduction. CONCLUSIONS: Mortality rates showed a limited decrease. Strategies need to be strengthened, mainly in the central and southeastern regions, and to focus on the control of tobacco use by women.

Lung cancer mortality trends in Mexico, 1998-2018: the impact of the General Law on Tobacco Control / Tendências de mortalidade por câncer de pulmão no México, 1998-2018: o impacto da Lei Geral de Controle do Tabaco

ABSTRACT: Objective: The aim of this study was to describe trends in lung cancer (LC) mortality and trends in tobacco use. Methods: This is an ecological time-series study to determine mortality trends due to lung cancer resulting from tobacco consumption, based on secondary open-access sources, such as the National Surveys. Smoking prevalence, tobacco use trends, mortality rates, and percentage were determined by LC. The mortality trend from LC was calculated, and a linear regression analysis was performed to evaluate the impact of the General Law for Tobacco Control. Results: The prevalence of tobacco use decreased steadily between 1988 and 2015, particularly in men. Mortality rates and percentage decreased between 1998 and 2018. During this period, the mortality rate decreased from 6.3 to 5.4 per 100,000 population (−0.032/100,000 each year, p<0.001), with a net decrease of 0.9 per 100,000. We observe increases in mortality in women in the central and southeastern regions. Of 32 states, 18 showed a tendency to loss (p<0.005). The rate of change for men was −0.24, with a total reduction of 2.17 before the introduction of the laws and −0.32 after their introduction, a total reduction of 3.24 (p<0.005). Women showed no reduction. Conclusions: Mortality rates showed a limited decrease. Strategies need to be strengthened, mainly in the central and southeastern regions, and to focus on the control of tobacco use by women.

RESUMO: Objetivos: Descrever tendências na mortalidade por câncer de pulmão e no uso do tabaco. Métodos: Realizamos um estudo ecológico de séries temporais para determinar a tendência de mortalidade por câncer de pulmão de acordo com o consumo de tabaco, com base em fontes secundárias de acesso aberto, como as Pesquisas Nacionais. Prevalência de tabagismo, tendências de uso de tabaco, porcentagem e taxas de mortalidade foram determinadas pelo câncer de pulmão. A tendência de mortalidade por câncer de pulmão foi calculada e uma análise de regressão linear foi realizada para avaliar o impacto da lei geral para o controle do tabagismo. Resultados: A prevalência do uso de tabaco diminuiu continuamente entre 1988 e 2015, principalmente em homens. As taxas e percentuais de mortalidade diminuíram entre 1998 e 2018. Durante esse período, a taxa de mortalidade diminuiu de 6,3 para 5,4 por 100 mil habitantes (-0,032 por 100 mil a cada ano, p<0,001), com redução líquida de 0,9 por 100 mil. Observamos aumentos na mortalidade de mulheres nas regiões Centro e Sudeste. Dos 32 estados, 18 apresentaram tendência à perda (p<0,005). A taxa de mudança para os homens foi de -0,24, com redução total de 2,17 antes da introdução das leis e -0,32 após a sua introdução — redução total de 3,24 (p<0,005). As mulheres não apresentaram redução. Conclusões: As taxas de mortalidade mostraram redução limitada. Estratégias precisam ser fortalecidas, principalmente nas regiões Centro e Sudeste, e deve-se enfocar o controle do uso do tabaco pelas mulheres.

Systematic review: SARS-COV-2 contagion prevention measures in vision health professionals.

The disease, which originated from the SARS-CoV-2 virus, is primarily transmitted by direct contact with infected individuals. Visual healthcare professionals perform clinical practices that pose a significant risk of infection due to their proximity with patients during the examination. This systematic review aims to identify preventive measures that will aid in reducing the risk of infection during standard appointments between patients and visual health professionals. A systematic review was done for articles published in indexed journals from December 2019 to December 2020. The search for these articles was done in 3 electronic databases. As part of the search criteria, articles were selected if they had the keywords (SARS-CoV-2), (COVID-19), and coronavirus combined with ophthalmology, optometry, eye care, and the eye. Once duplicated and unrelated items were eliminated, 36 articles of interest were selected. Seven sections were described in detail: telephone screening, (COVID-19) triage, decreasing transmission within shared spaces, hand washing, use of personal protective equipment Personal Protective Equipment (PPE), cleaning of diagnostic instruments, and use of telemedicine. This paper helps healthcare professionals to better understand the context of the "new normal" clinical practice. Visual health professionals and their patients must adhere to norms and use the indicated PPE during the consultation to safeguard each other.

Trends in breast-conserving surgery in Mexico after the implementation of a public health insurance system.

Although breast conserving surgery is the standard of care for patients with localized breast cancer in high-income countries, little is known about its use in developing countries, where disparities in access to treatment may lead to an increased use of mastectomy. We examined the use of breast conserving surgery at a Mexican cancer center after the implementation of a public insurance program aimed at providing coverage for previously uninsured patients. Between 2006 and 2016, 4519 women received surgical treatment for breast cancer, of which 39% had early-stage disease. The proportion of patients treated with breast conserving surgery increased from 10% in the 2006-2009 period to 33% in the 2013-2016 period, with most of this increase occurring among women with early-stage disease (17-52%). Improving access to care and reducing the financial burden of breast cancer in developing countries may lead to an increased use of breast conserving surgery.

Psychophysiological stress response of newly-diagnosed breast cancer patients with and without risk of metabolic syndrome / Respuesta psicofisiológica al estrés de pacientes con cáncer de mama de diagnóstico reciente, con y sin riesgo de síndrome metabólico

Abstract Introduction Little is known about how metabolic comorbidity affects stress response during breast cancer (BRCa) after a recent diagnosis. Objective To evaluate the physiological and psychological differences between the BRCa-RSxM groups and those with BRCa alone, and the influence of psychological variables and comorbidity in terms of stress response. Method Comparative non-experimental causal-descriptive study. Fifty patients recently diagnosed with BRCa (25 with BRCa and 25 with BRCa-RSxM) in a convenience sample participated. Frontal muscle activity and skin conductance were recorded in response to stressful conditions. Quality of life, perceived stress, and coping strategies scales were used. Results The presence of comorbidity (p = .001; p = .02), perceived stress (p = .004; p = .03), and social quality of life (p = .01; p = .01) influenced muscle activation and conductance during the emotional stressor (ES). Putting the stressful situation into perspective as a cognitive coping strategy was related to a decrease in activation (p = .04). An increase in physiological activation during the cognitive stressor (CS) was influenced by comorbidity (p = .05) and quality of social life (p = .01; p = .01). In turn, a decrease was influenced by the increase in age (p = .02). Discussion Physiological vulnerability, coping strategies (behavioral and cognitive), and prior learning influenced the resulting reaction during the stressful situation. Conclusion A metabolic disease, as a prelude to an oncological, may cause physiological vulnerability to respond adequately to stressful conditions.

Resumen Introducción Es poco lo que se sabe acerca de cómo afecta a una comorbilidad metabólica a la respuesta al estrés durante el cáncer de mama (CaMa) tras un diagnóstico reciente Objetivo Evaluar las diferencias fisiológicas y psicológicas entre los grupos de CaMa-RSxM y sólo con CaMa, y la influencia de las variables psicológicas y la comorbilidad en cuanto a la respuesta al estrés. Método Estudio no experimental descriptivo-causal comparativo. Participaron 50 pacientes con diagnóstico reciente de CaMa (25 en CaMa y 25 en CaMa-RSxM) en un muestreo por conveniencia. Se registraron la actividad muscular frontal y la conductancia de la piel frente a condiciones estresantes. Se aplicaron escalas de calidad de vida, estrés percibido y estrategias de afrontamiento. Resultados La presencia de la comorbilidad (p = .001; p = .02), estrés percibido (p = .004; p = .03) y la calidad de vida social (p = .01; p = .01) influyeron en la activación muscular y la conductancia durante el estresor emocional (EE). Poner en perspectiva la situación estresante como estrategia cognitiva de afrontamiento se relacionó con una disminución de la activación (p = .04). El aumento de activación fisiológica durante el estresor cognitivo (EC) estuvo influido por la comorbilidad (p = .05) y la calidad de vida social (p = .01; p = .01); a su vez, la disminución lo estuvo por el aumento en los años de edad (p = .02). Discusión La vulnerabilidad fisiológica, las estrategias de afrontamiento (conductuales y cognitivas) y el aprendizaje previo influyeron en la reacción resultante surgida durante la situación estresante. Conclusión Una enfermedad metabólica, como antesala de una oncológica, puede ocasionar vulnerabilidad fisiológica para responder adecuadamente a condiciones estresantes.

[Prognostic factors in patients with breast cancer and brain metastasis as the first site of recurrence]. / Factores pronósticos en pacientes con cáncer de mama y metástasis cerebral como primer sitio de recurrencia.

OBJECTIVE: To evaluate the prognostic factors (clinicalpathological characteristics and treatments) in patients with breast cancer and metastasis to central nervous system (CNS) as the first site of the disease. MATERIAL AND METHODS: Kaplan-Meier method and life tables were used to estimate overall survival time over a retrospective cohort of 125 breast cancer patients treated at the Instituto Nacional de Cancerología (INCan) during 2007-2015, who presented metastasis to the CNS as the first site of extension of the disease. The cox proportional hazards model was used to determine the prognosis factors. RESULTS: The median overall survival time was 14.2 months (IC95%: 11.83-26.93). Patients with triple negative (TN), according to inmunohistochemistry analysis classification, had lower survival times (p=0.0004) and had a risk of dying two times (p=0.037) higher than patients with a different immunophenotype (HR: 2.77. 95%CI: 1.10-6.99). The degree of intermediate SBR increases the risk of dying in patients with metastasis (HR 2.76, 95% CI: 1.17-6.51). CONCLUSIONS: CNS metastasis continues to be a poor prognostic factor that reduces survival and affects quality of life. It is recommended to monitor the early presence of clinical neurological manifestations during follow-up for prompt treatment. TN patients have worse prognosis and HER2+ a better control.

OBJETIVO: Evaluar los factores pronósticos (características clínico-patológicas y tratamientos) en las pacientes con cáncer de mama y metástasis al sistema nervioso central (SNC) como primer sitio de afección. MATERIAL Y MÉTODOS: Cohorte retrospectiva, formada por 125 pacientes con cáncer de mama atendidas en el Instituto Nacional de Cancerología durante 2007-2015, quienes presentaron afección en el SNC como primer sitio de metástasis. A través del método Kaplan-Meier y tablas de vida se estimó la supervivencia global. El modelo de riesgos proporcionales de Cox fue utilizado para determinar los factores pronósticos. RESULTADOS: La mediana de supervivencia global fue de 14.2 meses (IC95% 11.8-26.9). Pacientes clasificadas por inmunohistoquímica como triple negativo (TN) presentaron tiempos de supervivencia más cortos (p<0.004) y con dos veces más riesgo de fallecer, en comparación con los otros inmunofenotipos (HR= 2.77; IC95% 1.10-6.99); asimismo, se identificó que un grado intermedio en la escala Scarff-Bloom-Richardson incrementa el riesgo de morir en pacientes con metástasis (HR=2.76; IC95% 1.17-6.51). CONCLUSIONES: La metástasis al SNC continúa siendo un factor de mal pronóstico que reduce la supervivencia y afecta la calidad de vida. Se recomienda vigilar puntualmente la presencia de manifestaciones clínicas neurológicas durante el seguimiento, para una rápida intervención. Las pacientes TN tienen peor pronóstico, y las HER2+ (es decir, con resultado positivo para el receptor 2 del factor de crecimiento humano epidérmico), mejor control a mediano plazo.

Factores pronósticos en pacientes con cáncer de mama y metástasis cerebral como primer sitio de recurrencia / Prognostic factors in patients with breast cáncer and brain metastasis as the first site of recurrence

Resumen: Objetivo: Evaluar los factores pronósticos (características clínico-patológicas y tratamientos) en las pacientes con cáncer de mama y metástasis al sistema nervioso central (SNC) como primer sitio de afección. Material y métodos: Cohorte retrospectiva, formada por 125 pacientes con cáncer de mama atendidas en el Instituto Nacional de Cancerología durante 2007-2015, quienes presentaron afección en el SNC como primer sitio de metástasis. A través del método Kaplan-Meier y tablas de vida se estimó la supervivencia global. El modelo de riesgos proporcionales de Cox fue utilizado para determinar los factores pronósticos. Resultados: La mediana de supervivencia global fue de 14.2 meses (IC95% 11.8-26.9). Pacientes clasificadas por inmunohistoquímica como triple negativo (TN) presentaron tiempos de supervivencia más cortos (p<0.004) y con dos veces más riesgo de fallecer, en comparación con los otros inmunofenotipos (HR= 2.77; IC95% 1.10-6.99); asimismo, se identificó que un grado intermedio en la escala Scarff-Bloom-Richardson incrementa el riesgo de morir en pacientes con metástasis (HR=2.76; IC95% 1.17-6.51). Conclusiones: La metástasis al SNC continúa siendo un factor de mal pronóstico que reduce la supervivencia y afecta la calidad de vida. Se recomienda vigilar puntualmente la presencia de manifestaciones clínicas neurológicas durante el seguimiento, para una rápida intervención. Las pacientes TN tienen peor pronóstico, y las HER2+ (es decir, con resultado positivo para el receptor 2 del factor de crecimiento humano epidérmico), mejor control a mediano plazo.

Abstract: Objective: To evaluate the prognostic factors (clinical-pathological characteristics and treatments) in patients with breast cancer and metastasis to central nervous system (CNS) as the first site of the disease. Materials and methods: Kaplan-Meier method and life tables were used to estimate overall survival time over a retrospective cohort of 125 breast cancer patients treated at the Instituto Nacional de Cancerología (INCan) during 2007-2015, who presented metastasis to the CNS as the first site of extension of the disease. The cox proportional hazards model was used to determine the prognosis factors. Result: The median overall survival time was 14.2 months (IC95%: 11.83-26.93). Patients with triple negative (TN), according to inmunohistochemistry analysis classification, had lower survival times (p=0.0004) and had a risk of dying two times (p=0.037) higher than patients with a different immunophenotype (HR: 2.77. 95%CI: 1.10-6.99). The degree of intermediate SBR increases the risk of dying in patients with metastasis (HR 2.76, 95% CI: 1.17-6.51). Conclusion: CNS metastasis continues to be a poor prognostic factor that reduces survival and affects quality of life. It is recommended to monitor the early presence of clinical neurological manifestations during follow-up for prompt treatment. TN patients have worse prognosis and HER2+ a better control.

Glazed clay pottery and lead exposure in Mexico: Current experimental evidence.

OBJECTIVES: Lead exposure remains a significant environmental problem; lead is neurotoxic, especially in developing humans. In Mexico, lead in human blood is still a concern. Historically, much of the lead exposure is attributed to the use of handcrafted clay pottery for cooking, storing and serving food. However, experimental cause-and-effect demonstration is lacking. The present study explores this issue with a prospective experimental approach. METHODS: We used handcrafted clay containers to prepare and store lemonade, which was supplied as drinking water to pregnant rats throughout the gestational period. RESULTS AND DISCUSSION: We found that clay pots, jars, and mugs leached on average 200 µg/l lead, and exposure to the lemonade resulted in 2.5 µg/dl of lead in the pregnant rats' blood. Neonates also showed increased lead content in the hippocampus and cerebellum. Caspase-3 activity was found to be statistically increased in the hippocampus in prenatally exposed neonates, suggesting increased apoptosis in that brain region. Glazed ceramics are still an important source of lead exposure in Mexico, and our results confirm that pregnancy is a vulnerable period for brain development.